Numerical Simulation of Unreinforced Masonry Buildings with Timber Diaphragms

Tomić, Igor; Vanin, Francesco; Božulić, Ivana; Beyer, Katrin

doi:10.3390/buildings11050205

Cited by 13 publications

(8 citation statements)

References 66 publications

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“…An analysis of the results of studies of the seismic resistance of buildings shows that many authors studied particular issues of the strength of a building and its individual enclosures. As in our research, the authors of work [16] point to the advisability of using numerical studies of the seismic resistance of brick buildings. The features of the destruction of building enclosures as a result of an earthquake showed that the structural units of the interface of the external enclosures with each other are the most vulnerable.…”

Section: Discussionmentioning

confidence: 63%

Full-Fledged Use of Semi-Basement Space by Building Seismic-Resistance, Energy-Efficiency, Microclimate and Preventing Influences of Thermal Bridges and Mold Growth

Boronbaev¹,

Unaspekov²,

Abdyldaeva³

et al. 2022

cea

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The known theory and experience of energy-saving architecture allow solving the article's task and ensuring sufficient insolation, passive solar heating, and occupants contact with nature through semi-basement windows. The goal is a full-fledged use of the semi-basement space achieved for seismically active regions with a moderate, cold, and hot climate by ensuring the normative seismic-resistance, energy-efficiency, and microclimate of the building and preventing influence of thermal bridges and mold growth. The set of recommendations also covers the provision of the required sanitary-hygienic conditions in the semi-basement rooms. The multidisciplinary problem is solved by integrating the methodologies of various fields of science. By means of numerical investigations, it established that the soil adjacent to the semi-basement foundation wall increases the thermal mass and building envelope heat-protection capacity. The isotherms and the intensity of heat fluxes made it possible to eliminate the effect of thermal bridges that interact with the soil and outside air. The expedient thickness and width of the additional layer of thermal insulation of thermal bridge zones in excess of the normative layer of the enclosure's thermal insulation were established. The graphical dependence of the wall's inner corner temperature from this width allows selecting the microclimate level. A multilateral contribution to building improvement is derived from a single-family home example: comfortable microclimate conditions have been created in the semi-basement for placing main rooms there; energy savings for heating this space is 16-20%; saving of monolithic frame and foundation concrete is 10-12% ensuring the higher than normative building seismic-resistance.

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Section: Discussionmentioning

confidence: 63%

Full-Fledged Use of Semi-Basement Space by Building Seismic-Resistance, Energy-Efficiency, Microclimate and Preventing Influences of Thermal Bridges and Mold Growth

Boronbaev¹,

Unaspekov²,

Abdyldaeva³

et al. 2022

cea

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“…The second challenge while modeling such buildings are the wooden floors that are usually used. These types of floors are considered very flexible and the connections with the masonry walls are usually not well detailed [61,62]. Consequently, the behavior of the building is quite complex when using the non-linear static pushover analysis.…”

Section: Discussionmentioning

confidence: 99%

Post-Earthquake Assessment of a Historical Masonry Building after the Zagreb Earthquake—Case Study

et al. 2022

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After the Zagreb earthquakes in March of 2020, around 25,000 buildings were estimated damaged, most of them being in the historic city center. This fact is not that surprising since most of the city center buildings are unreinforced masonry structures that have not been assessed in quite some time and usually no retrofitting methods were ever applied. The rapid post-disaster assessment began the same day after the first earthquake occurred. Through mostly visual assessment methods, the basic idea is to identify the safety and usability of buildings in general. This type of assessment was also conducted in one of the oldest Croatian cultural institutions, Matica Hrvatska. It is a building of great historical significance and cultural value, as is most of the city center. Accordingly, this building was constructed with no consideration given to seismic events and with the use of traditional materials and building techniques. In the scope of this paper, urgent actions that were taken are shown with problems and challenges that occurred. Furthermore, the decision-making process after an earthquake is elaborated. In addition, a numerical model is developed in 3Muri software for structural modeling. A non-linear static pushover analysis is performed, and possible failure mechanisms are examined. Furthermore, real-life damage is compared to the software results, and a conclusion process of the building’s usability is explained. In the end, the results obtained are analyzed and conclusions regarding the efficiency of the used software are drawn.

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“…Perfect fixed restraints were considered at the bases of the walls. A perfect connection has been considered to model the wall to wall connection (Kahrizi and Tahamouli Roudsari 2020;Solarino et al 2019;Tomić et al 2021b).…”

Section: Geometrical Modelmentioning

confidence: 99%

Preliminary nonlinear analysis of a scaled masonry building under shaking test for the blind prediction of the SERA AIMS project

Ramaglia

Lignola

Prota

2023

Bull Earthquake Eng

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Experimental tests performed on scaled masonry buildings provide key information to improve the knowledge under seismic actions. Masonry buildings behavior is strongly influenced by their physical and mechanical parameters under dynamic actions. In fact, the actual structural behavior is very complex to predict due to the significant variability of the input parameters and the strong heterogeneity of masonry. Furthermore, the behavior of masonry buildings is often influenced by the interaction with adjacent building units. In this context, the SERA AIMS project aims to improve knowledge on the interaction between adjacent buildings. In order to assess the seismic capacity of masonry structures and their damage evolution, nonlinear models often require a numerical calibration of nonlinear parameters. Simplified Finite Element (FE) models, with some very simple assumptions, can be more suitable for complex problems like as the interaction between adjacent building aggregates. The low initial knowledge level in the SERA AIMS blind competition favored simple assumptions. The availability of simple models allowed to perform consecutive time histories including the cumulative effects of previous signals. In fact, the tested prototype was subjected to many replicas. The masonry structure and the crucial interfaces between the units have been modelled by means of nonlinear elements according to the reduced knowledge level at the blind prediction stage. The main goal was to estimate the key information of a masonry building under seismic action like as: triggering and the type of damage at the most stressed areas and therefore the load threshold at which evident damage is expected. Global FE model provides information on the global behaviour (in plane behaviour), while, according to the failure models typically found in masonry buildings, kinematic analyses have been performed to assess the out of plane (local) behaviour, too. The numerical results obtained by the preliminary analysis have been compared with the experimentally detected damages. The simplified approach, based on limited information without calibration, discussed in this paper, represents a useful support tool to design dynamic tests on full-scale or scaled masonry buildings, but also to assess the vulnerability of real masonry structures.

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Numerical Simulation of Unreinforced Masonry Buildings with Timber Diaphragms

Cited by 13 publications

References 66 publications

Full-Fledged Use of Semi-Basement Space by Building Seismic-Resistance, Energy-Efficiency, Microclimate and Preventing Influences of Thermal Bridges and Mold Growth

Full-Fledged Use of Semi-Basement Space by Building Seismic-Resistance, Energy-Efficiency, Microclimate and Preventing Influences of Thermal Bridges and Mold Growth

Post-Earthquake Assessment of a Historical Masonry Building after the Zagreb Earthquake—Case Study

Preliminary nonlinear analysis of a scaled masonry building under shaking test for the blind prediction of the SERA AIMS project

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